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Data Set Maintenance: Data set compiled and standard item. Data set author(s): Kainz C. Data set reviewer(s): Schubert K. (06-01-24); revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Erysiphaceae Tul. & C. Tul.; Erysiphales.

Type Information: Basionym: Erysiphe malachrae Seaver. Type: Erysiphe malachrae Seaver.

Taxonomic Literature: Taxonomic notes: Peridium very thin, one conspicuous layer, at first subhyaline, later yellowish to light brown, semitransparent.+ascocarp outer wall cells irregularly polygonal, obscure, ca. 6-14 µm diam.;. Braun U., Beih. Nova Hedwigia 89: 1-700 [273] (1987).

Biogeography: Continent: Southern America (Argentina, Brazil, Chile, Peru, Puerto Rico, Venezuela). Country or state(s): Puerto Rico, Venezuela, and Peru.

Ecology: Biotroph; phytopathogenic; growing on leaves, epiphyllous (mainly; effused, often covering the entire surface of the leaves, subevanescent, diseased part of the leaf slightly discoloured) or amphigenous. Host or Phorophyte Taxonomy: Malachra capitata; Malvaceae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Cleistothecioid, orbicular, forming independently from the host thallus or mycelium, scattered or gregarious (the densely crowded ascocarps often form ochre to yellowish brown patches or covers on the leaves), (.045)-.05-.07-(.075) mm in diam.. Margin: External filaments absent or present (very short, rudimentary, width subuniform throughout); mycelioid, straight, .2-.75-(1) µm long, 5-7.5 µm in diameter, hyaline, few, 1-3 per mm², growing at the ascocarp base, smooth, not ramified or ramified, not branched, aseptate or septate (0-1-septate).

Asci: 2-3-(4) asci per ascocarp, not stipitate, 45-65 µm long, (30)-35-45-(55) µm wide; dehiscence unitunicate.

Ascospores: 1–2 to c. 8 per ascus, spores (2)-4-5-(6) per ascus, ellipsoid or ovoid, 17-28 µm long, 12.5-18.5 µm wide; septa absent; wall hyaline or pale brown.

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